Create process instance for specific version

[ChrisKujawa]

Allows creating a process instance for a specific version and BPMN process id via the verify steady-state command.
This is useful for the deployment distribution command.

Furthermore, I also created the first version of a Zeebe Fake client, in order to intercept values which are set on the client requests. This allows us to create more unit tests where we can verify whether the right properties and values are set.

Added some new tests for the process instance creation via version and BPMN process id.

closes #244

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Example:

Deploy model

$ ./zbchaos deploy process -v
Connecting to zell-chaos
Running experiment in self-managed environment.
Successfully created port forwarding tunnel
Deploy 10 versions of different type of models.
Deployed [2/10] versions.
Deployed [4/10] versions.
Deployed [6/10] versions.
Deployed [8/10] versions.
Deployed [10/10] versions.
Deployed different process models of different types and versions to zeebe!

Non-verbose: Start instance for a specific version

$ ./zbchaos verify steady-state --version 10 --bpmnProcessId multiVersion
The steady-state was successfully verified!

We can see in operate:

Verbose: Start instance for a specific version

$ ./zbchaos verify steady-state --version 10 --bpmnProcessId multiVersion -v
Connecting to zell-chaos
Running experiment in self-managed environment.
Successfully created port forwarding tunnel
Create process instance with BPMN process ID multiVersion and version 10 [variables: '', awaitResult: false]
Created process instance with key 4503599627370497 on partition 2, required partition 1.
Created process instance with key 6755399441055745 on partition 3, required partition 1.
Created process instance with key 2251799813685299 on partition 1, required partition 1.
The steady-state was successfully verified!

[lenaschoenburg]

LGTM 👍

Good idea to start mocking zeebe client!